55161868 has 12 divisors (see below), whose sum is σ = 96843880. Its totient is φ = 27492192.

The previous prime is 55161859. The next prime is 55161881. The reversal of 55161868 is 86816155.

It is a self number, because there is not a number n which added to its sum of digits gives 55161868.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20778 + ... + 23281.

Almost surely, 2^55161868 is an apocalyptic number.

It is an amenable number.

55161868 is a deficient number, since it is larger than the sum of its proper divisors (41682012).

55161868 is a wasteful number, since it uses less digits than its factorization.

55161868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44376 (or 44374 counting only the distinct ones).

The product of its digits is 57600, while the sum is 40.

The square root of 55161868 is about 7427.1036077330. The cubic root of 55161868 is about 380.6679572294.

The spelling of 55161868 in words is "fifty-five million, one hundred sixty-one thousand, eight hundred sixty-eight".